So if we're going with Haxorus as the strongest Pokémon, what does that make the weakest?

The first thing that comes to my mind is Chingling, that poor tiny adorable thing! Who would ever have thought to take such a small delicate object and make it battle huge beasts like dragons, bears and dinosaurs? I must admit his stats aren't terrible, but with unspectacular moves and a less-than-average typing I don't think the poor baby has much of a chance in any real battles. The other Pokémon that came to mind was Pichu, but with the right amount of luck he can be a true annoyance to fight competitively haha.